Web Material Elongation Testing Device Automation

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Solution Overview

Problem

Current methods for determining the elongation properties of web-shaped materials, such as bandages, require significant manual labor and can result in systematic measurement errors due to friction and uneven tensile force application.

Innovation Solution

A testing device comprising a pulling mechanism, a winding roller, and a length measuring sensor, which allows for automatic determination of elongation properties by unwinding the web material, applying a predetermined tensile force, and measuring the stretched length.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If manual force stretching systems are used to determine elongation properties, then measurement can be performed, but significant manual labor is required and systematic measurement errors occur due to friction and uneven tensile force application

Engineering Contradiction:

Improvemeasurement accuracyVSAvoidmanual labor requirement

Core Design Contradiction:

Measurement precisionVSEase of operation

Solution Approach 1:

The patent replaces the manual mechanical stretching system with an automated testing device that uses a motor-driven pulling mechanism to apply tensile force. This substitution eliminates manual labor while ensuring consistent and accurate application of force, thereby improving both ease of operation and measurement precision through automated control of the stretching process

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The testing device is designed to automatically perform the entire elongation measurement process without requiring continuous human intervention. The automated system independently applies force, measures elongation, and records data, making the measurement process self-sufficient and eliminating the need for operators to manually handle the stretching operation

Inventive Principle:

Principle #25Self-service

2Productivity

If manual force stretching systems are used, then elongation measurement can be performed, but systematic measurement errors occur due to friction and uneven tensile force application

Engineering Contradiction:

Improvetesting efficiencyVSAvoidmeasurement accuracy

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The testing device incorporates sensors and control systems that continuously monitor the stretching process and provide feedback to the control unit. This feedback mechanism ensures that the tensile force is applied uniformly and accurately, correcting any deviations in real-time to maintain high measurement precision while enabling automated operation

Inventive Principle:

Principle #23Feedback

3Ease of operation

If automated testing device is used, then manual labor is reduced and measurement accuracy is improved, but device complexity increases

Engineering Contradiction:

Improveautomation levelVSAvoiddevice structure

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The testing device is designed as a multi-functional automated system that combines the pulling mechanism, winding roller, length measuring sensor, and control unit into a single integrated device. This universal design allows the device to perform multiple functions (stretching, winding, measuring, and data processing) automatically, reducing the need for separate manual operations while managing complexity through functional integration

Inventive Principle:

Principle #6Universality (Multi-functionality)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The testing device reduces manual labor, minimizes measurement errors, and provides more accurate and efficient determination of elongation properties, enhancing process control and quality assurance in web material production.

Implementation Method 1

The stretched length of the web-shaped material can be determined using the length measuring sensor

Methodology Applied

Scientific EffectLength measurement:

Data Source

PatentEP4571286A1Testing device and method for determining the elongation properties of web-shaped materials

Publication Date: 2025.06.18 KOB GMBH

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AI summary

The present invention relates to a testing device for determining the stretch properties of web-shaped, in particular textile, material. The testing device comprises a first region in which the web-shaped material is provided in a preferably wound storage state, and a third region comprising a tensioning device, a winding roller, and a length-measuring sensor. Optionally, the testing device comprises a second region in which the unstretched length of the web-shaped material can be determined. The tensioning device is designed to convey the web-shaped material to the winding roller. The web-shaped material is stretched under the action of a predetermined tensile force between the tensioning device and the winding roller and is then wound onto the winding roller under the action of the tensile force. The stretched length is determined by means of the length-measuring sensor.